Of cos....there is always a more sinister intention to all these requirements for police clothing.
Here's what I can think of.
a) young man tells future g/f that he is a TP. Thus will need some pics and clothing items to subtlely show off lah.
b) young man wanted to dress up as a TP to scare off other road users.
c) young man wannabe TP. keeps a collection at home to feel safe/closer to their ideals.
d) young man need to bluff their family members to allow him to attend certain courses which the family members object to. (But for work, then family members will have no choice mah.)
e) young man was misled to believe that police clothing can ward off evil spirits.